Fix merged manga chapters and merged manga filtered scanlators

data/src/main/java/tachiyomi/data/chapter/ChapterRepositoryImpl.kt

@@ -151,5 +151,17 @@ class ChapterRepositoryImpl(
             )
         }
     }
+
+    override suspend fun getScanlatorsByMergeId(mangaId: Long): List<String> {
+        return handler.awaitList {
+            chaptersQueries.getScanlatorsByMergeId(mangaId) { it.orEmpty() }
+        }
+    }
+
+    override fun getScanlatorsByMergeIdAsFlow(mangaId: Long): Flow<List<String>> {
+        return handler.subscribeToList {
+            chaptersQueries.getScanlatorsByMergeId(mangaId) { it.orEmpty() }
+        }
+    }
     // SY <--
 }

data/src/main/sqldelight/tachiyomi/data/chapters.sq

@@ -71,20 +71,28 @@ AND manga_id = :mangaId;
 
 getMergedChaptersByMangaId:
 SELECT C.*
-FROM chapters C
-JOIN (
-    SELECT manga_id FROM merged WHERE merge_id = :mangaId
+FROM (
+    SELECT manga_id,merge_id FROM merged WHERE merge_id = :mangaId
 ) AS M
+JOIN chapters C
 ON C.manga_id = M.manga_id
 LEFT JOIN excluded_scanlators ES
-ON C.manga_id = ES.manga_id
+ON M.merge_id = ES.manga_id
 AND C.scanlator = ES.scanlator
-WHERE C.manga_id = :mangaId
+WHERE M.merge_id = :mangaId
 AND (
     :applyScanlatorFilter = 0
     OR ES.scanlator IS NULL
 );
 
+getScanlatorsByMergeId:
+SELECT scanlator
+FROM (
+    SELECT manga_id FROM merged WHERE merge_id = ?
+) AS M
+JOIN chapters
+ON chapters.manga_id = M.manga_id;
+
 removeChaptersWithIds:
 DELETE FROM chapters
 WHERE _id IN :chapterIds;